Tetren
[化] 四乙五胺; 四亞乙基五胺
??? 情景例句
Nothing remains to be said.
現(xiàn)在已經(jīng)沒什么好說的了。
He who has not tasted bitter knows not what sweet is.
不吃苦中苦，哪知甜中甜。
The long jump
跳遠(yuǎn)